Microsoft Office: error 0x8004FC12 on Windows 10 - what to do?

The error 0x8004FC12 in Microsoft Office under Windows 10 says little about the actual cause. In this practical tip, we will tell you how to fix this and activate Microsoft Office successfully.

Fix error 0x8004FC12 in Microsoft Office on Windows 10

If you receive this error message when activating Office on Windows 10, simply follow the instructions below to successfully activate Office:

1. First download the UltraSurf tool to your PC and install it.
2. When the installation is complete, start the tool with a double click.
3. Wait until the message "Successfully connected to Network" appears below.
4. Then start Office and try the activation again. The error message should no longer appear.
5. If this is the case, make sure that UltraSurf is not blocked by your firewall. You can easily configure this with the free tool Windows 10 Firewall Control.

This practical tip is based on Microsoft Office 2016 and UltraSurf 13.04 on Windows 10. In the next practical tip, find out what you can do if you cannot activate Windows 10.